Leather-splitting machine



Patented June 2, `1885.

(No Model.)

G. L. TYLER.

LEATHER SPLITTING MACHINE. No. 319,357.

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G. L. TYLER.. LEATHER SPLITTING MACHINE; No. 319,357. YPatented June 2,1885.

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GfETYLEE.

LEATEEE SELIETING MACHINE. No. 319,357. I l Patented June 2, 1885.

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GEORGE L. TYLER, @FLY-NN, MASSACHUSETTS.'

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SPECIFICATION forming part of Letters Patent N07. 3l9,`357,fdated June2, 1885.

` pplication filed September 3, 1883. (o model.)

.To aZZ whom it may concern: y

, Beit known that I, GEORGE L. TYLER, of Lynn, in the county of Essexand Commonwealth of Massachusetts, have invented certain new and usefulImprovements in Leather- Splitting Machines, of which the following,taken in connection with the accompanying drawings, is a specification.Figure 1 of the drawings shows my invention in perspective. Fig. 2 isthe same as Fig. l, except the top back roll, which is here representedas thrown upward and backward on its supporting-arm. (In this figure thefront of the machine is the right hand' of the figure.) Fig. 3 is atransverse vertical ,section cut through the feed-rolls, and representsthe righthand end of the machine whenviewing Fig.

l. The cutting-plane in making this view is supposed to pass through themachine on dotted line xx, 4indicated in Fig. 4E. Fig. i is alongitudinal vertical section cut through the machine on dotted line yy, as indicated in Fig 3, and illustrates the position of thetrimming-knife relatively to the feedingrolls. Figs. 5 and 6 illustratethe mechanism for holding Vand adjusting the edge trimming knifen rIhisinvention is an improvement to be applied to the machine described andshown in Letters Patent of the UnitedStates granted to me, dated May 24,1881, numbered 242,079, and entitled Machine for Splitting Leather,7

and further shown and described in Letters Patent of the UnitedStatesgranted to me, dated the 7th day of February, 1882, numbered 253,449,and entitled Leather-Splitting Machine, to which Letters Patentreference may be had.

By reference to the above-mentioned Letters Patent it will be readilyunderstood that the object of this series of inventions is to effect asaving of leather. This is done by taking a piece of the leather,whichmay be so small as to be ordinarily useless, and rst trim it to astraight line on one edge,and then split it through the centerlongitudinally, except a little line along the straight edge, where itis left united, and then opening out thetwo halves made by so splittingthe piece, and as a result produce one piece hinged together at thecenter and having twice the sur- :face and half the thickness of theoriginal i piece. Heretofolre it has been customary to cut the piecestraight on one side before subjecting it to the machine; but to effectthis result automatically while passing it through the machine is.theobjcct of this last improvement in said machine.

This present invention consists in a trim- `ming-knife so arranged inreference to the 6o feed-rolls and splitting-knife described in theLetters Patent above referred to, and also in reference to theadditional rolls to be described hereinafter, as to cause apiece ofleather ,in passing through the machine to be autolmatically trimmedthereby to a straight line ,on one edge before being subjected to theoperation of splitting the same longitudinally,

, as referred to in the patents above mentioned.

The invention also relates to improvements 7o in the feeding and guidingmechanism involvling matters of construction, more fully de 1scribedhereinafter, and specifically pointed out in the claims.

I shall not repeat here the description of 7 5 those parts of themachine which have already lbeen fully explained in the Letters Patentabove referred to, since the additional features herein presented havebeen added to the machine as there described without having made so anymaterial change inthe arrangement of those parts or in the manner ofworking the Directlyin front of the feed-rolls A A, as

` represented in the above-named Letters Patent S 5 No. 253,449, I havearranged two' additional rolls,B B. (See Fig. l.) Said rolls B B areprovided with suitable gearing, which is arranged at the left side ofthe machine, as represented, and which operates the rolls, so as tocause the contiguous surfaces thereof to move in the same directiontoward the rolls AAin an obvious manner.` The top roll, B, is journaledin the pivoted arm a, which permits being turned up, as represented inFig. 2. The top 9 5 roll, B, when put down,as represented in Fig. l, isheld in contact with the bottom roll by means of the pin b, which passesdown through a hole in the end ofthe supporting-arms a, and out throughthe bottom of the machine. It is 10o held in position by means of a nuton the end thereof, while a spring, arranged in an obvious mannerbetween the head of the pin b and the end of the arm a, permits the rollto yield up rolls A A and carried thereby directly to thesplitting-knifef.

At the end of therolls B B is arranged the trimming-knife 2. Thecutting-edge of this knife bears against the ends of the rolls, and

slightly in rear of the vertical line whichV passes through the centersof the rolls. (See Fig. 3.) The back of the knife rests against the endof the guard-plate 3, and the inner side of the knife is in the sameplane with the inner side of the guard-plate 3, and so connected formswith the plate3 a guard leading from the cutting-edge of the knife 2tothe rear end of the splitting-knifef. The distance between this guardand the side of the knife f determines the amount of leather leftunsplit along the straight edge of the piece, as more fully described inthe Letters Patent referred to above.

' From theforegoing it will be understood that a piece of leather isfirst fed into the rolls B B, and is carried thereby onto the knife 2,which trims the edgeof the leather, leaving the piece which passesthrough the rolls nearly or quite straight on one edge. It is thendirectly `taken up by th'e rolls A A, (its straight edge being always incontact with the guard 3,) and is carried forward by the rolls A A ontothe splitting-knife f, whereby the leather is split nearly or quitethrough the center longitudinally, as more fully explained in theLetters Patent above referred to. It is then opened out and ready foruse. y

When apiece of leather is placed between the feed-rolls B B it is ofcourse important that the straightened edge thereof, as it leaves Vthecutting-edge of the knife 2, should press closely against the side ofthe knife and the guard 3 while it passes through the machine. Thisoperation is effected by the peculiar shape of the feed-rolls A A and BB, which are formed with unequal diameters, the largest diameter beingat the right-hand end, Fig. 2, and gradually diminished till theshortest diameter is reached at the opposite end. This conical form ofthe rolls, though but little,4

tends to' press the leather closely up against the knife and guard, asdescribed. Theplate e, arranged as shown in Fig. 3, prevents thepiecesfrom falling down between the two' sets of rolls, while a suitabletable orplate,

h, is arranged at the front of the machine,on v which the pieces may belaid before being passed tothe rolls, all of which is plainly useful,though not absolutely indispensable.

Figs. 5 and 6 are detached sectional views illustrating thetrimming-knife 2 and its adj usting mechanism. Said mechanism consistsof the plate 4 and eccentric pins 5 and 6. The plate 4 is clampedagainst the bottom or bed plate of the -machine by means of the saidpins 5 and 6, all arranged as represented in Fig. 5. The pins areprovided with cams arranged to operate in suitable holes in the plate,as seen in Fig. 6. The trimming-knife 2 is extended through a slot inthe end of the plate 4, as represented. By reference to Fig. 2 it willbe observed that the knife is fitted ina suitable niche formed bycutting into the corner of the guard 3. This is brought about byclamping the plate 4 to the bottom of the machine-table in such positionas to allow the knife 2 to extend upward at the end of tlierolls B B,and in close proximity to the said guard 3. The eccentric pins 5 and 6are then operated to press the knife into the niche in the guard 3 andrrnly clamp it against the same, as represented. This method `ofclamping the knife against the guard gives great strength and stabilitythereto', and enables it to enter the very hardest leather withoutdanger of breaking.

I claiml. In combination, in a machine for splitting leather, rolls A B,a splitting-knife parallel with the axis of said rolls, and anedgetrimming knife and suitable guide, said knife and guide being set inthe manner described,

whereby a part of the leather on the trimmed edge is left unsplit,substantially as described. 2. In combination with a leather-splittingmachine, the rolls A B, the splitting-knife f and the trimming-knife 2,with suitable guides, the knifes and guides being arranged in relationto each other, as described, whereby the splitting-knife cuts within theline ofthe trimming-knife and leaves an uncut edge, substantially asdescribed. .s

3. The combination,in aleather-splitting machine,of the feeding-rollsAAand B B, made of slight conical form, the guard-plate 3 andcutting-knife 2 in the described relation to the feeding-rolls, and thecutting-instrumentf, all substantially as described.

4. In combination with the guard 3, the plate 4,slotted at one end toreceive the knife 2, the said plate being secured to the bottom plate ofthe machine bythe eccentric pins 5 and 6, whereby it is adapted to clampthe ICJ knife 2inposition, substantially as described.

Signed in presence of two witnesses.

l GEO. L. TYLER.

Witnesses:

BENJ. K. Pnnn'rrss, Jr., C. B. TUTTLE.

